Living happily in the same rooming house, Jean Desias and Etien Toussot are disturbed by the news of war. They must return to France to fight for their country. Lizette and Francois, Jean's motherless children, are left in the care of Helen, Etien's daughter. Together with Jimmy, a fireman, rooming in the same house, Helen bids farewell to the two patriots at the steamer's dock. On the way home Helen's purse is stolen and all the money left her to tide over the stormy times of war is gone. She is left penniless. Forced to earn a living for herself and the kiddies, she accepts a position as chorus girl in "Big Ed" Morton's theater. In her innocence, she does not understand the meaning of Morton's attentions to her. Jimmy has been assigned as fireman to Morton's theater. Helen and he have become fast friends, and spend many evenings together, enjoying the pranks of the kiddies. He welcomes the opportunity of being near her at the theater. Morton has invited his friend, Harrigan, the ward leader to the theater. In a rage, Jimmy watches their ugly advances to Helen. Harrigan embraces her and whispers an insulting offer, Jimmy springs upon him and soundly thrashes him. Morton, attempting to assist Harrigan, also feels the force of Jimmy's wrath. In revenge, Harrigan exerts his political influence and secures the discharge of Jimmy from the fire department. Morton, enraged by the failure of his aim, discharges Helen. Little Lizette, searching for her doll, sets the house afire and before long the frame structure is a mass of seething flames. Jimmy, returning from a search for work, sees the fire, and with the instinct of a true fireman and heedless of his own safety, he rushes into the building. Jimmy is in the hospital. In saving Helen and the children, he has been injured, but not without reward. His bravery has won back his position in the department, and more important yet, it has won him the love of Helen. Jean and Etien are returning and soon the little family will be together to see the beginning of a journey which will take Jimmy and Helen through a happy life, made beautiful by an undying love.